Attachment assembly



FIG. 1 is a perspective view of an attachment assembly showing my new design shown on a dental floss holder.

FIG. 2 is a top plan view of an attachment assembly showing my new design.

FIG. 3 is a front elevational view of an attachment assembly showing my new design; and,

FIG. 4 is a right side elevational view of an attachment assembly showing my new design.

The broken lines in the drawing are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an attachment assembly, as shown and described. 